{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ea6d833a3fddcd1d60414d48f34c7f4fbe88608f"
            },
            {
              "fixed": "826170a49ca1315af6b293a02200585b1e2186d9"
            },
            {
              "fixed": "a991c28066e7ba4da7450bb04478849f7ac6a14a"
            },
            {
              "fixed": "21d0f05989bf0d5cef57b467a7fa4feefbd7236a"
            },
            {
              "fixed": "b5965c4221165045e19736794ca5f48ae3d67142"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.15.0"
            },
            {
              "fixed": "6.12.113"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.56"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98722.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: block2mtd: Fix divide error when erase_size is zero\n\nThe erase size is parsed from the \"block2mtd\" module parameter and can\nbe set to zero. add_device() then evaluates\n\n        if (size % erase_size)\n\nwith a zero divisor, which triggers a divide error:\n\ndivide error: 0000 [#1] PREEMPT SMP PTI\nRIP: 0010:add_device drivers/mtd/devices/block2mtd.c:296 [inline]\nRIP: 0010:block2mtd_setup2+0x592/0xda0 drivers/mtd/devices/block2mtd.c:459\nCall Trace:\nblock2mtd_setup+0x27/0xe0 drivers/mtd/devices/block2mtd.c:476\nparam_attr_store+0x214/0x310 kernel/params.c:589\nmodule_attr_store+0x65/0x90 kernel/params.c:904\nkernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345\n...\n\nReject a zero erase size before performing the modulo operation so the\nexisting \"erasesize must be a divisor of device size\" error path\nreports the invalid argument and frees the device.",
  "id": "CVE-2026-98722",
  "modified": "2026-10-20T02:30:31.706793778Z",
  "published": "2026-10-18T15:46:58.093Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/21d0f05989bf0d5cef57b467a7fa4feefbd7236a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/826170a49ca1315af6b293a02200585b1e2186d9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a991c28066e7ba4da7450bb04478849f7ac6a14a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b5965c4221165045e19736794ca5f48ae3d67142"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98722.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98722"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "mtd: block2mtd: Fix divide error when erase_size is zero"
}